Thanks for the answers. How about using Michelin desert tires front and rear? Is the rear to wide for the stock 450x wheels? Or is the high price that keeps the riders from using them? I used them on my rallye bikes and never had any issues or flats. They also last very long. Sorry guys for all this questions but I never raced desert here in US and I would like to use what has been proven to work and what most people use.